Geological map of Maryland on which are also shewn the chief topographical features to aid in the triangulation.

Alexander, J. H. 1812-1867.

Publication date

January 1840

Abstract

Scale 1:200,000.Manuscript; pen-and-ink.Relief shown by contours.Geologic information not shown.Shows only Washington, Frederick, Carroll, Montgomery, Howard, Prince Georges, Anne Arundel, Charles, Calvert, and St. Mary Counties.Includes text on "Materials employed.

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Geological map of Maryland on which are also shewn the chief topographical features to aid in the triangulation.

Abstract

Extracted data

Geological map of Maryland on which are also shewn the chief topographical features to aid in the triangulation.

Abstract

Extracted data

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